Author: fmsystems

VIDEO FIBER TRANSMISSION PROBLEM SOLVING

Have you ever installed a fiber optic video transmitter / receiver and discovered that you were not getting a good signal output and you knew you were putting in a good video signal but you were not getting the same good signal out. The video

CARSON’S RULE, CALCULATING FM MODULATION BANDWIDTH

A formula is used to determine the RF Bandwidth or occupancy for an FM signal. If you are designing an FM system on microwave or satellite, you will need to take care that your signal does not cross-talk into other signals on the system.

NTSC VIDEO PRE/DE-EMPHASIS NETWORK LOSS

Video Pre-Emphasis and De-Emphasis is used with Frequency Modulation (FM) transmission systems. It is used to offset the triangular noise distribution created by FM transmission systems. FM Fiber, Satellite and microwave transmission systems exhibit this kind of triangular noise pattern.

PICTURE QUALITY TESTING OF CCTV SYSTEMS

Picture quality can be defined by many different parameters, but the most important from an observed picture detail point of view is the LINES OF DEFINITION as observed on a Monitor. The larger the "number of lines" that can be distinguished, the greater the detail

HOW TO SHOOT A LICENSE PLATE WITH A CCTV CAMERA

When your customer asks you to set up a camera to grab a shot of a license plate on a car, here are a few things you will want to know.

HOW TO MAKE MAXIMUM USE OF YOUR VIDEO SIGNAL

The Vertical Interval (V.I.) is the part of the video signal that tells the monitor to start drawing a new screen. It is made up of special SYNCHRONIZATION pulses with no picture elements. This part of the video allows special command and control signals to

FM MULTIPLEXING WHY, WHEN AND HOW TO USE IT.

First of all, what are the advantages of FM Multiplexing over SSBSC? As with all comparative discussions, we must put equal constraints upon the processes to be compared. In this case, we constrain power density but require greater Signal-to-Noise Ratio (SNR) than the available power

WHY CATV CABLE DOES NOT WORK ON CCTV SYSTEMS

When pricing out the cable to use to build a Closed Circuit Television System (CCTV) to connect cameras to a central monitor location, many system operators are seduced by the much cheaper price of CATV cable. After all the specs quoted about the transmission at,

WHAT IS RETURN LOSS, AND WHY SHOULD I MEASURE IT

Once upon a time, "Return Loss" was a somewhat arcane term and used mainly with regard to high frequency transmission lines and the impedance transformations that could be the result of these reflected signals. Now however, with the advent of high speed Data transmission such

CCTV CAMERAS AND THE POLARIZING FILTER

Have you ever installed a CCTV camera that had a glaring “hot spot” or bright white area on the monitor, and around that bright spot the picture seemed to be out of focus or blurry, with poor picture detail? Or perhaps you had a camera